The meaning of EXPANSION is expanse. How to use expansion in a sentence.

Definition of expansion noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

EXPANSION definition: the act or process of expanding. See examples of expansion used in a sentence.

EXPANSION meaning: 1. the increase of something in size, number, or importance: 2. the increase of something in size…. Learn more.

1. the act or process of expanding. 2. the state or quality of being expanded. 3. the amount or degree of expanding. 4. an expanded portion or form of a thing.

Expansion is the part of an engine cycle in which the fluid increases in volume and makes a part such as a piston or flywheel move. The expansion of the gas pushes the piston inside the …

the state or quality of being expanded:[uncountable] Future expansion of the business will require us to build more factories. The runway is undergoing expansion to allow bigger planes to land …

There are 14 meanings listed in OED's entry for the noun expansion, two of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Oct 31, 2025 · (building) A new addition. synonym Synonym: annex My new office is in the expansion behind the main building.

EXPANSION meaning: 1 : the act of becoming bigger or of making something bigger the act of expanding; 2 : a more complete and detailed written work or set of comments based on …